Abu Salil says that a companion of the Prophet (peace be upon him) was narrating hadiths to the people. As the number of people increased, he began to sit on the roof of the house and narrate hadiths. He said: One day the Prophet (peace be upon him) asked the people, "Which is the greatest verse in the Qur'an?" A man said, "Ayat al-Kursi." That companion says: Upon hearing my answer, the Prophet (peace be upon him) placed his blessed hand between my two shoulders, the coolness of which I felt in my chest, and the Prophet (peace be upon him) said, "O Abu Mundhir, may knowledge be blessed for you."